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NAME

       g.findfile  - Searches for GRASS data base files and sets variables for the shell.

KEYWORDS

       general, map management, scripts

SYNOPSIS

       g.findfile
       g.findfile --help
       g.findfile  [-nl]  element=string  file=string   [mapset=string]    [--help]   [--verbose]
       [--quiet]  [--ui]

   Flags:
       -n
           Do not add quotes

       -l
           List available elements and exit

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       element=string [required]
           Name of an element

       file=string [required]
           Name of an existing map

       mapset=string
           Name of a mapset (default: search path)
           ’.’ for current mapset

DESCRIPTION

       g.findfile is designed for Bourne shell or Python scripts that need to search  for  mapset
       elements, including: raster, vector maps, region definitions and imagery groups.

       The  list  of  element  names  to  search for is not fixed; any subdirectory of the mapset
       directory is a valid element name.

       However, the user can  find  the  list  of  standard  GRASS  element  names  in  the  file
       $GISBASE/etc/element_list.  This  is  the  file which g.remove, g.rename and g.copy use to
       determine which files need to be deleted/renamed/copied for a given entity type.

NOTES

       g.findfile writes four lines to standard output:
       name=’file_name’
       mapset=’mapset_name’
       file=’unix_filename’
       fullname=’grass_fullname’
       The output is Bash commands to set the variable name to the GRASS  data  base  file  name,
       mapset  to  the  mapset in which the file resides, and file to the full UNIX path name for
       the named file. These variables may be set in the Bash as follows:
       eval `g.findfile element=name mapset=name file=name`

EXAMPLES

   SHELL
       Raster map example:
       eval `g.findfile element=cell file=elevation`
       If the specified file (here: raster map) does not exist, the  variables  will  be  set  as
       follows:
       name=
       mapset=
       fullname=
       file=
       The following is a way to test for this case:
       if [ ! "$file" ]
       then
            exit 1
       fi

       Vector map example (including error message):
       eval `g.findfile element=vector file="$G_OPT_V_INPUT"`
       if [ ! "$file" ] ; then
          g.message -e "Vector map <$G_OPT_V_INPUT> not found"
          exit 1
       fi

   PYTHON
       See Python Scripting Library for more info.

       Note: The Python tab in the wxGUI can be used for entering the following code:

       import grass.script as gcore
       gcore.find_file(’elevation’, element = ’cell’)

SEE ALSO

        g.filename, g.gisenv, g.mapsets, g.parser

AUTHOR

       Michael Shapiro, U.S.Army Construction Engineering Research Laboratory

       Last changed: $Date: 2018-08-31 17:01:15 +0200 (Fri, 31 Aug 2018) $

SOURCE CODE

       Available at: g.findfile source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.0 Reference Manual